for years from president bush to president obama, people have accused elected officials of using these anniversaries for political gain, especially during a presidential campaign. there's also the sense that after the big ten-year anniversary last year, perhaps it's time to scale back these big commemorative events and allow the victims's families have more privacy, more intimacy. so this year politicians have been banned from speaking at the ground zero ceremony and that includes president obama. instead he will be meeting with soldiers at walter reed. he will also be attending a private ceremony at the pentagon memorial. >> americans across the country will take a moment to reflect upon the events of september 11, 2001, and all that our country has been through together since then. >> reporter: it was 11 years ago this morning that that third plane crashed into the pentagon at 9:37 a.m. at that exact moment this morning, there will be a moment of silence at arlington national cemetery. there will also be that private ceremony that the president will be attending at the pentagon memor